The Necklace was a novel written by Mauricio, which mainly told the story of a poor housewife, Mathilde da Vinci, who fell into a scam in order to repair her necklace. Through the perspective of the heroine Mathilde, the novel reveals the greed and vanity of human nature, and also reflects the class differences and unfair phenomena in society. The novel tells us that poverty and vanity are the root causes of people falling into deception. Mathilde spent a lot of money to repair his necklace, but he ignored his real needs and values. This kind of behavior that pursued superficial vanity would eventually lead to him falling into a trap of deception and serious losses. The novel also revealed the class differences and unfairness in society. Mathilde's friends and family did not understand her situation and feelings. Instead, they thought her actions were wasteful and extravagant. This class concept and unfair treatment caused Mathilde to lose all her property in the scam, but it also made her deeply aware of the reality and injustice of society. Through the story of a rich housewife Mathilde, the novel tells us that vanity and poverty are the root causes of people falling into deception, and also reveals the class differences and unfair phenomena in society. Only by truly understanding and respecting the situation and feelings of others could one avoid falling into the trap of deception and serious losses.